Abstract: A metallic bell-type alarm device for indicating the need for refueling or otherwise adjusting the heat generated within a wood stove or the like. The device is mounted on or adjacent to a stove at a location where it can respond to heat fluctuations in the stove. It comprises a metallic casing and base plate having mounted therein a bimetallic spring having a free-riding clapper washer mounted thereon and a trigger rod that cooperate to sound a bell alarm when significant temperature changes cause the spring to react to change position and strike the metal casing to sound a bell alarm.

Abstract: An automatic liquid transfer system includes a horizontally translatable table and a vertically translatable set of pipettes. The table accommodates a titer tray having a multiplicity of receptacles to be filled, or holding liquid samples to be diluted, and a rack housing plural rows of disposable tips. During each cycle in a serial dilution process, a fresh set of tips are picked up by the pipettes and used to transfer liquid in a sterile manner from a sample or diluent source to a row of wells in the titer tray, or from one row to a succeeding row of wells where it is mixed with diluent. Thereafter, the tips are discharged back into the rack to maintain sterile conditions during the process. A sensor is provided on the machine to detect whether all of the tips in each set are disengaged and another set successfully picked up.

Abstract: A method and apparatus for producing X-rays having any selected one of a plurality of specific different wavelength spectra greatly facilitates X-ray fluorescence analysis of samples to detect constituent elements. In the X-ray source, an electron beam is directed to any selectable one of an array of primary targets of different composition. X-rays from the selected primary target may be utilized directly or caused to impinge on any selected one of a plurality of secondary targets, which are also each of differing composition to cause the secondary target to emit a specific X-ray spectrum characteristic of that secondary target. Analysis of the X-ray fluorescence from a sample irradiated by a plurality of different specific selected X-ray spectra enables identification and measurement of particular chemical elements in the sample.

Abstract: Method of transporting iron ore by forming an aqueous slurry containing by volume 20 to 45 percent iron ore; from 0.02 to 0.4 percent by weight based on iron ore in the slurry of a dispersant; and from 0.01 to 0.2 percent by weight based on water in the slurry of an organic polymer and moving the slurry through a pipeline.

Abstract: In the present invention, the problem of rapidly diagnosing faults in a data communication system is addressed and solved by incorporating one or more diagnostic networks which are controlled by a properly programmed host computer, and which enable the host computer itself to rapidly test the correct functioning of selected portions of the data communication system.

Abstract: A negative energy power supply which operates submerged equipment like a hydraulic actuator. A main component of the system is a submerged chamber held at substantially atmospheric pressure. It is connected to submerged equipment having intake and discharge ports controllable by remotely operated valves. When the intake port is opened to water at the submerged depth of the equipment and the discharge port is vented to the chamber, the resulting pressure difference operates the submerged equipment. The system can also have appropriately connected to it, a pressure amplifier to increase the water pressure at a submerged location and a pump to purge the chamber.

Abstract: A self-contained wire line inflatable packer useful to carry an impression sleeve into a well for making impressions of the well surface, the inflatable sleeve of the wire line packer being automatically sequentially inflated and deflated by a valve controlled by a sequencing timer actuating means utilizing the flow of a noncompressible liquid through an orifice to provide time-sequenced operation.

Abstract: A self-contained wire line inflatable packer useful to carry an impression sleeve into a well for making impressions of the well surface, the inflatable sleeve of the wire line packer being automatically sequentially inflated and deflated by a valve controlled by a sequencing timer actuating means driven by an operating gas.

Abstract: An apparatus for stopping the flow of gas under pressure from a relief valve comprises an elongated tube which fits around a flue secured to a tank. The apparatus has means for maintaining the tube in this position. An elongated rod is extended through the tube and secured into a load-transferring position so that it rests on the pressure valve assembly, thus preventing the assembly from opening.The method for sealing off a leaky safety valve has a first step of placing a tube over a flue for a safety valve. This tube has a bar adjustably secured within and generally coaxial with it. The bar is lowered until it sits on the valve head so as to restrain the valve from leaking.